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photopigment

Line breaks: photo|pig¦ment
Pronunciation: /ˈfəʊtəʊˈpɪɡm(ə)nt
 
/

Definition of photopigment in English:

noun

A pigment whose chemical state depends on its degree of illumination, such as those in the retina of the eye.
Example sentences
  • The difference absorption spectroscopy in both living plasmodium and cell homogenate shows that there is a photopigment which converts reversibly between red and far-red types.
  • There is no physiological evidence for a third photopigment sensitive to blue wavelengths.
  • It could involve retinal photoreceptors, extraretinal photoreceptors in the pineal or elsewhere, photopigments such as cryptochromes within the retina or brain, or it might be mediated through a non-visual pathway.

Definition of photopigment in:

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